Abstract
In an attempt to extend detection theory beyond the intensive domain, both frequency and intensity discrimination data were collected for four subjects using several psychophysical procedures. These included Yes-No, 2IFC, Same-Different with a positive increment, and Same-Different with a negative increment. The two-interval conditions were run with both fixed and random bases. Two increment sizes were used for each condition. The results for intensity discrimination showed the dependencies on method so that the desired intermethod evaluation of frequency discrimination could be effected. Intersubject variability was significantly greater for frequency than for intensity discrimination, but the frequency data for each individual were quite orderly.
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